Impaired delayed hypersensitivity.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001555:Benzene Derivatives; D002648:Child; D002675:Child, Preschool; D006632:Histamine; D006801:Humans; D006968:Hypersensitivity, Delayed; D007223:Infant; D008875:Middle Aged; D012882:Skin Tests
D001555:Benzene Derivatives; D006632:Histamine